Welding robot joint connection reinforcement structure

Abstract

The utility model relates to robot joint part technical field, concretely for welding robot joint connection reinforcing structure, including ferrule no.

Description

Technical Field

[0001] This utility model relates to the field of robot joint component technology, specifically to a welding robot joint connection reinforcement structure. Background Technology

[0002] A welding robot is a device that mounts welding tools (such as welding torches or cutting torches) at the end effector of an industrial robot, enabling it to perform welding. In a welding robot, a joint refers to the movable connection between the segments of the robotic arm, or between the robotic arm and its base or end effector; it is equivalent to the robot's joints or pivots and is a core component enabling multi-degree-of-freedom movement of the robotic arm. Welding robots are widely used in industries such as automotive manufacturing, construction machinery, shipbuilding, and aerospace. Their core advantages are improved welding precision, stability, and production efficiency, while reducing the safety risks of manual operation.

[0003] Traditional welding robot joints mostly employ single-flange bolt connections or shaft-hole mating structures, primarily focusing on meeting the basic rotational requirements of conventional robotic arms. However, under the harsh conditions of welding operations, the limited contact area of ​​traditional flange connections leads to uneven bolt stress. High-frequency stresses generated by arc impact and welding torch vibration during welding tend to concentrate at the bolt hole edges or flange weld seams, easily causing flange deformation, bolt loosening, and even breakage after prolonged operation. Furthermore, the clearance in shaft-hole mating structures is difficult to eliminate, and vibration further exacerbates this clearance widening, resulting in drift in joint motion accuracy. This fails to meet the demands of high-precision applications such as thin-plate welding in automobiles and welding of precision components, thus presenting certain shortcomings. Utility Model Content

[0004] The purpose of this invention is to provide a joint connection reinforcement structure for welding robots to solve the problems mentioned in the background art. To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A welding robot joint connection reinforcement structure includes a first collar and a second collar. The first collar is located at one end of the second collar. Two swing arms are fixedly installed on both sides of the middle of one end of the first collar. An inner turntable is fixedly installed at one end of each of the two swing arms. A rotating groove is opened on one side of the middle of each of the two inner turntables. Two swing arms are fixedly installed at one end of each of the two second collars. An outer turntable is fixedly installed at one end of each of the two swing arms. A rotating retainer is fixedly installed on one side of the middle of each of the two outer turntables.

[0005] In some embodiments, mounting screw holes are provided on both sides of the middle portion of one end of the first collar and the second collar.

[0006] In some embodiments, a limiting groove is provided on the other side of the middle of each of the two outer turntables, and a rotating rod is rotatably engaged in the middle of each of the two limiting grooves.

[0007] In some embodiments, a column is fixedly installed at the upper end of each of the two rotating rods, and a crossbar is fixedly installed at the middle of the two columns.

[0008] In some embodiments, the rotating retaining ring is rotatably engaged with the middle of the rotating retaining groove. In some embodiments, the two outer turntables are located outside the two inner turntables, respectively.

[0009] In some embodiments, the first collar and the second collar are rotated and engaged by the cooperation of an inner turntable and an outer turntable.

[0010] This utility model has at least the following beneficial effects: 1. When using this utility model, there is no need to modify the original structure of the arm body. It can be directly adapted to existing welding robots by bolt fixing. The dual connection structure of nested snap-fit ​​and bolt rigid fixation can significantly increase the joint contact area, effectively disperse the stress generated by the impact and vibration of the welding arc, and avoid the stress concentration problem of traditional single flange connection. It ensures that the collar and the arm body are integrated, prevents joint deformation, loosening or displacement under welding conditions, and improves load bearing capacity.

[0011] 2. When this utility model is in use, the constraint cooperation between the limiting rotating groove and the rotating rod can accurately limit the vertical swing range of the upper arm, avoid the risk of collision caused by excessive rotation and the deviation of the welding torch posture, and ensure welding accuracy; the load is distributed by the snap-fit ​​structure and the limiting cooperation point through two paths, avoiding a single structure bearing the entire load for a long time, reducing the wear rate of rotating parts, and extending the service life of the joint. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the first appearance structure of the present utility model; Figure 2 This is a schematic diagram of the second appearance structure of the present utility model; Figure 3 This is a schematic diagram of the disassembled structure of this utility model; Figure 4 This is a schematic diagram of the disassembled structure of the collar of this utility model; Figure 5 This diagram illustrates the relative rotational position relationship between collar one and collar two of this utility model. Figure 1 ; Figure 6 This diagram illustrates the relative rotational position relationship between collar one and collar two of this utility model. Figure 2 .

[0013] In the diagram: 1. Collar 1; 11. Collar 2; 12. Mounting screw hole; 13. Swing arm 1; 14. Inner turntable; 15. Rotating slot; 16. Swing arm 2; 17. Outer turntable; 18. Rotating circlip; 19. Limiting slot; 20. Rotating rod; 21. Column; 22. Crossbar. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Example 1: Please refer to Figure 1 - Figure 4 This utility model provides a technical solution: a joint connection reinforcement structure for a welding robot, including a first collar 1 and a second collar 11. The first collar 1 is located at one end of the second collar 11. Two swing arms 13 are fixedly installed on both sides of the middle part of one end of the first collar 1. Two inner turntables 14 are fixedly installed at one end of each swing arm 13. A rotating slot 15 is opened on one side of the middle part of each of the two inner turntables 14. Two swing arms 26 are fixedly installed at one end of each of the two swing arms 21. An outer turntable 17 is fixedly installed at one end of each of the two outer turntables 17. A rotating retaining ring 18 is fixedly installed on one side of the middle part of each of the two outer turntables 17. The rotating retaining ring 18 is rotatably engaged in the middle part of the rotating slot 15. The two outer turntables 17 are located on the outside of the two inner turntables 14. The first collar 1 and the second collar 11 are rotatably engaged through the cooperation of the inner turntables 14 and the outer turntables 17.

[0016] In this embodiment, a nested structure of inner turntable 14 and outer turntable 17 is adopted. The outer turntable 17 covers the outer side of the inner turntable 14. Combined with the precise engagement of rotating retaining ring 18 and rotating retaining groove 15, the contact area of ​​the joint connection is greatly increased, effectively dispersing the stress transmitted by arc impact and tool vibration during welding operations. This effectively avoids the stress concentration problem of traditional single flange connection and prevents deformation or loosening at the joint connection. Collar 1 and Collar 2 11 are fixed to the surfaces of the lower arm and upper arm, respectively, forming a double-wrapped protection for the joint connection. Combined with the rigid support of swing arm 13 and swing arm 2 16, the overall structural rigidity of the joint is strengthened, which can stably bear the load of the upper arm and welding tool, ensuring no shaking or gap during vertical angle adjustment. Collar 1 and Collar 2 11 are directly fixed to the surfaces of the lower arm and upper arm, without the need for complex structural modifications to the arm body itself. It has strong adaptability and can be directly applied to the upgrade and modification of existing welding robot joints, reducing modification costs.

[0017] Example 2: Figure 1 - Figure 6 As shown, mounting screw holes 12 are provided on both sides of the middle of one end of collar 1 and collar 2 11, and limit grooves 19 are provided on the other side of the middle of the two outer turntables 17.

[0018] In this embodiment, the mounting screw holes 12 on both sides of the middle of one end of collar 1 and collar 2 11 can be used with high-strength bolts to achieve rigid fixation between the collar and the lower arm and the upper arm. The preload of the bolt connection can eliminate the assembly gap between the collar and the arm body, avoid welding vibration causing the collar to shift or fall off, ensure that the joint connection structure and the robot arm body form a stable whole, and improve the load bearing capacity.

[0019] Example 3: As Figure 1 - Figure 6 As shown, a rotating rod 20 is rotatably engaged in the middle of each of the two limiting rotating slots 19, and a column 21 is fixedly installed at the upper end of each of the two rotating rods 20. A crossbar 22 is fixedly installed in the middle of each of the two columns 21.

[0020] In this embodiment, the limiting groove 19 on the other side of the middle of the outer turntable 17 is rotatably engaged with the rotating rod 20, which limits the rotation trajectory of the rotating rod 20 and indirectly constrains the vertical swing range of the upper arm. This prevents the upper arm from colliding with the lower arm due to excessive rotation, or from exceeding the preset welding angle range, thus avoiding welding defects caused by welding gun position deviation. The rotational cooperation between the limiting groove 19 and the rotating rod 20 can share the radial load of the two sets of inner turntables 14 and outer turntables 17 engaging parts, preventing the single-sided engaging structure from bearing the full load for a long time and accelerating wear.

[0021] Working principle: like Figure 1 - Figure 6 As shown, in use, collar 1 and collar 2 11 serve as the lower arm and upper arm connecting bases, respectively. Through mounting screw holes 12 on both sides of the center of one end, high-strength bolts are used to achieve rigid fixation to the surfaces of the lower and upper arms. The bolt preload completely eliminates the assembly gap between the collar and the arm body, forming a stable integrated structure and preventing displacement or detachment of the collar due to welding vibration, thus providing a reliable support foundation for subsequent rotational connections. Furthermore, this installation method requires no modification to the arm body itself and can be directly adapted to upgrades of existing robot joints.

[0022] The swing arm 13 at the end of collar 1 drives the inner turntable 14 to extend, and the swing arm 16 at the end of collar 11 drives the outer turntable 17 to engage synchronously, so that the outer turntable 17 covers the outside of the inner turntable 14, forming a nested mating structure. At this time, the rotating retaining ring 18 on the outer turntable 17 is precisely engaged in the rotating retaining groove 15 of the inner turntable 14, forming a multi-contact rotating pair. This nested design can significantly increase the contact area of ​​the joint connection. The stress transmitted by the arc impact and tool vibration during welding can be dispersed in all directions through the contact surface, effectively avoiding the stress concentration problem of traditional single flange connection and preventing deformation or loosening of the joint connection. When the upper arm needs to be adjusted vertically, the upper arm drives collar 11, swing arm 16 and outer turntable 17 to rotate synchronously with the engagement of the inner turntable 14 and the rotating retaining ring 18 as the rotation axis. During this process, the limiting groove 19 on the other side of the middle of the outer turntable 17 and the rotating rod 20 form a rotation constraint pair. The rotating rod 20 rotates along the trajectory of the limiting groove 19, which indirectly limits the vertical swing range of the upper arm, prevents the upper arm from colliding with the lower arm due to excessive rotation, or exceeds the preset welding angle range, and ensures that the welding torch always maintains a precise welding posture, avoiding welding defects caused by angle deviation.

[0023] During welding operations, the load on the upper arm and welding tools is transferred to the swing arm 16 and outer turntable 17 via the collar 11. Part of the load is borne by the locking structure between the inner turntable 14 and the rotating retaining ring 18, while the other part of the load is transferred to the mating point between the limiting groove 19 and the rotating rod 20 via the outer turntable 17. This avoids a single locking structure bearing the entire radial load for a long time, significantly reducing the wear rate of the inner turntable 14 and the outer turntable 17, and extending the service life of the joint's rotating components. At the same time, the rigid support provided by the swing arm 13 and the swing arm 16 further strengthens the overall structural rigidity of the joint, ensuring no wobbling or gaps during vertical angle adjustment and stably bearing the welding load.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A joint connection reinforcement structure for a welding robot, comprising a first collar (1) and a second collar (11), wherein the first collar (1) is located at one end of the second collar (11), characterized in that: Both sides of the middle of one end of the collar (1) are fixedly installed with swing arms (13), and one end of each swing arm (13) is fixedly installed with an inner turntable (14). One side of the middle of each inner turntable (14) is provided with a rotating slot (15). One end of each collar (11) is fixedly installed with a swing arm (16), and one end of each swing arm (16) is fixedly installed with an outer turntable (17). One side of the middle of each outer turntable (17) is fixedly installed with a rotating clasp (18).

2. The welding robot joint connection reinforcement structure according to claim 1, characterized in that: Both sides of the middle part of one end of the collar one (1) and collar two (11) are provided with mounting screw holes (12).

3. The welding robot joint connection reinforcement structure according to claim 2, characterized in that: On the other side of the middle of the two outer turntables (17), there are limit grooves (19), and the middle of the two limit grooves (19) is rotatably connected to a rotating rod (20).

4. The welding robot joint connection reinforcement structure according to claim 3, characterized in that: The upper ends of the two rotating rods (20) are fixedly installed with columns (21), and the middle of the two columns (21) is fixedly installed with crossbars (22).

5. The welding robot joint connection reinforcement structure according to claim 1, characterized in that: The rotating retaining ring (18) is rotatably engaged in the middle of the rotating retaining groove (15).

6. The welding robot joint connection reinforcement structure according to claim 1, characterized in that: The two outer turntables (17) are located on the outside of the two inner turntables (14).

7. The welding robot joint connection reinforcement structure according to claim 1, characterized in that: The first collar (1) and the second collar (11) are rotated and engaged by the cooperation of the inner turntable (14) and the outer turntable (17).

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